Help... Cramps in abdomen and hips when urinating? :(

Lilly • Mum to two girls.
I'm 19 weeks pregnant with my first and two or three times today I've gotten cramps in my abdomen when urinating. I read a few things online about it being because of moving organs and such, but has anyone experienced this with a UTI? I might ship myself to the doctor tomorrow and get it checked out in case but if anyone has anything to share that'd be nice, it's 11:15pm and I'm freaking out! :(